121356620 has 48 divisors (see below), whose sum is σ = 317737728. Its totient is φ = 37824960.

The previous prime is 121356617. The next prime is 121356623. The reversal of 121356620 is 26653121.

It is an interprime number because it is at equal distance from previous prime (121356617) and next prime (121356623).

It is a self number, because there is not a number n which added to its sum of digits gives 121356620.

It is not an unprimeable number, because it can be changed into a prime (121356623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37862 + ... + 40941.

It is an arithmetic number, because the mean of its divisors is an integer number (6619536).

Almost surely, 2^121356620 is an apocalyptic number.

121356620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121356620 is an abundant number, since it is smaller than the sum of its proper divisors (196381108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121356620 is a wasteful number, since it uses less digits than its factorization.

121356620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78830 (or 78828 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 121356620 is about 11016.1980737458. The cubic root of 121356620 is about 495.0941833506.

The spelling of 121356620 in words is "one hundred twenty-one million, three hundred fifty-six thousand, six hundred twenty".